massey



(No Model.)

i G. B. MASSEY. S

COMPOUND BEAM ENGINE No; 257,355. Patented May 2,1882.

ATTORNEYS.

IIIIIIIIIIII N PETERS Pinch-Lithographer, Washingibll. Dv C.

UNITED STATES PATENT OFFICE.

GIDEON B. MASSEY, OF NEW YORK, N. Y., ASSIGNOR TO JACOB LORILLARD,TRUSTEE, OF SAME PLACE.

COMPOUND BEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 25' (',355, dated May2, 1882.

I A ppiication filed December 31, 1881. X model.)

To all whom rt may concern:-

Be it known that I, GIDEON BLAcKBUn-N MASSEY, of New York, in the countyand State of New York, have invented a new and useful Improvement inCompound Beam-Engines, of which the following is a full, clear, andexact description, reference being had to the annexed drawings, formingpart of this specification.

My improvements relate to the class of engines in which low-pressurecylinders for using the exhauststeam are combined with the cylindersusing steam under high pressure.

The object of my invention is to obviate the diiiiculty heretoforeexperienced from backpressure and long openings and connectingpipes,which I accomplish by direct and continuously open connections betweenthe two cylinders and a compound piston in the highpressure cylinder, bywhich the primary and secondary exhausts are regulated, as hereinafterdescribed.

The present application forms the second part of a division of originalapplication No. 2 47,201, filed December 2, 1881, ofwhich originalapplication the first part is shown and described in Letters Patent No.252,485, dated January 17, 1882.

In the accompanying drawings, Figure 1 0 shows a sectional elevation ofmy invention as appliol to a beam-engine; and Fig. 2 represents aportion of the low-pressure cylinder, showing a modification.

In the Letters Patent No. 252,485 I have 5 shown a high-pressurecylinder having two pistons upon the same rod and provided withsteam-ports at its ends and an exhaust-port at its midlength and at eachend, in combination with a low-pressure cylinder placed alongside 0 thehigh-pressure cylinder and communicating therewith by direct ports andhaving a single piston. In the present invention I have modified thegeneral construction above described so as to adapt the compoundcylinders to use in connection with a beamengine. Instead of arrangingthe cylinders alongside each other, I place the low-pressure cylinder Bin a vertical position, with its rod 12 connected to the beam, and thehighpressure-cylinder A in a horizontal position, with its rod mconnected to a crank on the shaft. The cylinder A passes through thecylinder B at its midlength, the longitudinal axis being removed fromthe center line to allow passage of the piston-rods, and in the-sides ofcylinder A are the ports 0 b, that admit steam to cylinder B. In thiscase, the low-pressure cylinder beingdivided, I provide two pistons, qq, secured to the same rod 22 and working in the opposite ends of saidcylinder. With this construction the cylinder B needs no heads on itsends for its proper working; but I prefer to use heads, as shown, andconnect the cylinder ends by a pipe, 2, that allows the inclosed air topass back and forth as the pistons reciprocate.

At the ends of cylinder A are the exhaustports 0 c and thesteam-ports cc, communicating with the main steam and exhaust openings, and at themidlength of cylinder A is the exhaust-port g, as shown in my otherinvention above referred to. The valves h 71/ are fitted in connectionwith the ports e c, and are to be provided with suitable means for theiroperation. Z Z are the pistons of cylinder A, secured upon the rod m.When the pistons lot the high-pressure cylinder A are in the positionshown in Fig. 1 the steam in thelower chamber of cylinder B exhauststhrough the lower port 1) into the space between pistons l, and thencethrough the exhaust-port g. At the same instant steam is admitted intothe upper chamber of cylinder B through the upper port I), and thepistons q of cylinder B are lifted to the top of their respectivechambers. On the return-stroke of pistons lthe upper port b will beopened, so that the steam in theupper chamber of cylinder 13 willexhaust into the space between the pistons l, and thence through theport g, while at the same time steam is admitted from cylinder A intothe lower chamber of cylinder B through the lower port I), which hasbeen opened by the same movement of the pistons l thatopened the upperport 11'.

For use as an air pump or compressor the cylinder B maybe fitted, asshown, with a valve, u, in its lower end for inlet of air, and beneaththe valve is a spring, 1;, for counteracting the weight of the valve, soas to prevent the usual clatteroccasioned when the engine is slowed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In compound engines, the combination of the intersectingcylinders AB,com1nunicating by ports I) b, pistons l l on rod m, pistons q g on rodp, and the steam and exhaust ports 6 e g of the high-pressure cylinder,substantially as shown and described.

2. In compound engines, the combination, with high pressure cylinder A,of the lowpressure cylinder B, connected directly therewith, the pistonsq 9, rod 10, and pipe t, substantially as shown and described.

3. In compound engines, the combination of twointersecting cylinderscommunicating wit each other by open ports and a compound piston in thehigh-pressure cylinder fitted to act as valves for the low-pressurecylinder, sub- 25 stantially as shown and described.

The above specification of my improvement in compound beam-enginessigned by me this 23d day of December, 1881.

G. B. MASSEY.

Witnesses:

O. SEDGWICK, A. G. LYNE.

